GTCC grading criteria specifies that if a major error in packet placement, vertical and/or horizontal angulation is made such that a tooth or a critical anatomical area cannot be seen within the image in question or any other image within the series (FMS or BW), then ________?
1) the image needs to be retaken
2) the image can still be used for diagnosis
3) the image should be enhanced
4) the image should be cropped